520400611 has 2 divisors, whose sum is σ = 520400612. Its totient is φ = 520400610.

The previous prime is 520400593. The next prime is 520400623. The reversal of 520400611 is 116004025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520400611 - 2¹¹ = 520398563 is a prime.

It is not a weakly prime, because it can be changed into another prime (520400641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260200305 + 260200306.

It is an arithmetic number, because the mean of its divisors is an integer number (260200306).

Almost surely, 2^520400611 is an apocalyptic number.

520400611 is a deficient number, since it is larger than the sum of its proper divisors (1).

520400611 is an equidigital number, since it uses as much as digits as its factorization.

520400611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 520400611 is about 22812.2907880818. The cubic root of 520400611 is about 804.3516047307.

Adding to 520400611 its reverse (116004025), we get a palindrome (636404636).

The spelling of 520400611 in words is "five hundred twenty million, four hundred thousand, six hundred eleven".